US11572378B2 - Heterocyclic compound and organic light-emitting device including the same - Google Patents
Heterocyclic compound and organic light-emitting device including the same Download PDFInfo
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Definitions
- Embodiments relate to a heterocyclic compound and an organic light-emitting device including the same.
- Organic light-emitting devices are self-emission devices that can produce full-color images, and may have wide viewing angles, high contrast ratios, short response times, and excellent characteristics in terms of brightness, driving voltage, and response speed.
- organic light-emitting devices may include a first electrode disposed on a substrate, and a hole transport region, an emission layer, an electron transport region, and a second electrode, which are sequentially disposed on the first electrode. Holes provided from the first electrode may move toward the emission layer through the hole transport region, and electrons provided from the second electrode may move toward the emission layer through the electron transport region. Carriers, such as holes and electrons, recombine in the emission layer to produce excitons. These excitons transit from an excited state to a ground state, thereby generating light.
- Embodiments are directed to a heterocyclic compound represented by Formula 1:
- a 1 may be selected from groups represented by Formulae 1-1 to 1-7:
- X 1 may be selected from O, S, SO 2 , N(R 12 ), C(R 13 )(R 14 ), Si(R 15 )(R 16 ), Se, Ge(R 17 )(R 18 ), and Sn(R 19 )(R 20 ),
- X 2 may be selected from O, S, N(R 21 ), C(R 22 )(R 23 ), and Si(R 24 )(R 25 ),
- R 1 to R 25 may each independently be selected from a group represented by Formula 2-1, a group represented by Formula 2-2, hydrogen, deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, a substituted or unsubstituted C 1 -C 60 alkyl group, a substituted or unsubstituted C 2 -C 60 alkenyl group, a substituted or unsubstituted C 2 -C 60 alkynyl group, a substituted or unsubstituted C 1 -C 60 alkoxy group, a substituted or unsubstituted C 6 -C 60 aryloxy group, and a substituted or unsubstituted C 6 -C 60 arylthio group,
- a 11 , L 1 , and L 2 may each independently be selected from a C 5 -C 60 carbocyclic group and a C 2 -C 60 heterocyclic group,
- a 12 may be a C 2 -C 60 heterocyclic group
- a1 and a2 may each independently be an integer from 0 to 5, wherein, when a1 is two or more, two or more L 1 (s) may be identical to or different from each other, and when a2 is two or more, two or more L 2 (s) may be identical to or different from each other,
- R 31 and R 32 may each independently be selected from hydrogen, deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, a substituted or unsubstituted C 1 -C 60 alkyl group, a substituted or unsubstituted C 2 -C 60 alkenyl group, a substituted or unsubstituted C 2 -C 60 alkynyl group, a substituted or unsubstituted C 1 -C 60 alkoxy group, a substituted or unsubstituted C 3 -C 10 cycloalkyl group, a substituted or unsubstituted C 1 -C 10 heterocycloalkyl group, a substituted or unsubstituted C 3 -C 10 cycloalkenyl group, a substituted or unsubstituted C 1 -C 10 heterocycloalkenyl group, a substituted or un
- b1, b2, c1, and c2 may each independently be an integer from 0 to 5, wherein, when b1 is two or more, two or more R 31 (s) may be identical to or different from each other, when b2 is two or more, two or more R 32 (s) may be identical to or different from each other, when c1 is two or more, two or more *-[(L 1 ) a1 -(R 31 ) b1 ](s) may be identical to or different from each other, and when c2 is two or more, two or more *-[(L 2 ) a2 -(R 32 ) b2 ](s) may be identical to or different from each other,
- R 2 , R 3 , R 5 , R 6 , R 8 , and R 9 in Formula 1 may be selected from a group represented by Formula 2-1 and a group represented by Formula 2-2,
- R 4 in Formula 1 may be a group represented by Formula 2-1, or
- R 4 and R 7 in Formula 1 may each independently be a group represented by Formula 2-1,
- At least one substituent of the substituted C 1 -C 60 alkyl group, the substituted C 2 -C 60 alkenyl group, the substituted C 2 -C 60 alkynyl group, the substituted C 1 -C 60 alkoxy group, the substituted C 3 -C 10 cycloalkyl group, the substituted C 1 -C 10 heterocycloalkyl group, the substituted C 3 -C 10 cycloalkenyl group, the substituted C 1 -C 10 heterocycloalkenyl group, the substituted C 6 -C 60 aryl group, the substituted C 6 -C 60 aryloxy group, the substituted C 6 -C 60 arylthio group, the substituted C 1 -C 60 heteroaryl group, the substituted monovalent non-aromatic condensed polycyclic group, and the substituted monovalent non-aromatic condensed heteropolycyclic group may be selected from:
- deuterium —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, an amidino group, a hydrazino group, a hydrazono group, a C 1 -C 60 alkyl group, a C 2 -C 60 alkenyl group, a C 2 -C 60 alkynyl group, and a C 1 -C 60 alkoxy group;
- Q 1 to Q 3 , Q 11 to Q 13 , Q 21 to Q 23 , and Q 31 to Q 33 may each independently be selected from hydrogen, deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, an amidino group, a hydrazino group, a hydrazono group, a C 1 -C 60 alkyl group, a C 2 -C 60 alkenyl group, a C 2 -C 60 alkynyl group, a C 1 -C 60 alkoxy group, a C 3 -C 10 cycloalkyl group, a C 1 -C 10 heterocycloalkyl group, a C 3 -C 10 cycloalkenyl group, a C 1 -C 10 heterocycloalkenyl group, a C 6 -C 60 aryl group, a C 6 -C 60 aryl group substituted with a C 1
- * indicates a binding site to a neighboring atom.
- Embodiments are also directed to an organic light-emitting device that includes: a first electrode; a second electrode facing the first electrode; and an organic layer between the first electrode and the second electrode and including an emission layer, wherein the organic layer includes at least one of the heterocyclic compound according to an embodiment.
- FIGURE is a schematic view of an organic light-emitting device according to an embodiment.
- the term “and/or” includes any and all combinations of one or more of the associated listed items. Expressions such as “at least one of,” when preceding a list of elements, modify the entire list of elements and do not modify the individual elements of the list.
- a heterocyclic compound according to an embodiment is represented by Formula 1:
- a 1 may be selected from groups represented by Formulae 1-1 to 1-7:
- X 1 may be selected from O, S, SO 2 , N(R 12 ), C(R 13 )(R 14 ), Si(R 15 )(R 16 ), Se, Ge(R 17 )(R 18 ), and Sn(R 19 )(R 20 ).
- X 1 may be O, S, SO 2 , N(R 12 ), C(R 13 )(R 14 ), or Si(R 15 )(R 16 ), for example.
- X 1 may be O.
- X 1 may be S.
- X 1 may be SO 2 .
- X 1 may be N(R 12 ).
- X 1 may be C(R 13 )(R 14 ).
- X 1 may be Si(R 15 )(R 16 ).
- X 2 may be selected from O, S, N(R 21 ), C(R 22 )(R 23 ), and Si(R 24 )(R 25 ).
- X 2 may be O.
- X 2 may be S.
- X 2 may be N(R 21 ).
- X 2 may be C(R 22 )(R 23 ).
- X 2 may be Si(R 24 )(R 25 ).
- R 1 to R 25 may each independently be selected from a group represented by Formula 2-1, a group represented by Formula 2-2, hydrogen, deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, a substituted or unsubstituted C 1 -C 60 alkyl group, a substituted or unsubstituted C 2 -C 60 alkenyl group, a substituted or unsubstituted C 2 -C 60 alkynyl group, a substituted or unsubstituted C 1 -C 60 alkoxy group, a substituted or unsubstituted C 6 -C 60 aryloxy group, and a substituted or unsubstituted C 6 -C 60 arylthio group.
- R 1 may be selected from:
- a phenyl group a biphenyl group, a terphenyl group, a pentalenyl group, an indenyl group, a naphthyl group, an azulenyl group, a heptalenyl group, an indacenyl group, an acenaphthyl group, a phenalenyl group, a phenanthrenyl group, an anthracenyl group, a fluoranthenyl group, a triphenylenyl group, a pyrenyl group, a chrysenyl group, a naphthacenyl group, a picenyl group, a perylenyl group, a pentaphenyl group, a hexacenyl group, a pentacenyl group, a rubicenyl group, a coronenyl group, and an ovalenyl group; and
- a phenyl group a biphenyl group, a terphenyl group, a pentalenyl group, an indenyl group, a naphthyl group, an azulenyl group, a heptalenyl group, an indacenyl group, an acenaphthyl group, a phenalenyl group, a phenanthrenyl group, an anthracenyl group, a fluoranthenyl group, a triphenylenyl group, a pyrenyl group, a chrysenyl group, a naphthacenyl group, a picenyl group, a perylenyl group, a pentaphenyl group, a hexacenyl group, a pentacenyl group, a rubicenyl group, a coronenyl group, and an ovalenyl group, each substituted with at least one selected
- R 1 may be selected from:
- R 2 to R 25 may each independently be selected from:
- a group represented by Formula 2-1 a group represented by Formula 2-2, hydrogen, deuterium, —F, —Br, —I, a hydroxyl group, a cyano group, a nitro group, a methyl group, an ethyl group, a propyl group, an isobutyl group, a sec-butyl group, ter-butyl group, a pentyl group, an isoamyl group, a hexyl group, and a C 1 -C 20 alkoxy group;
- a 11 , L 1 , and L 2 may each independently be selected from a C 5 -C 60 carbocyclic group and a C 2 -C 60 heterocyclic group.
- a 11 , L 1 , and L 2 may each independently be selected from:
- a benzene group a naphthalene group, a fluorene group, a spiro-bifluorene group, a benzofluorene group, a dibenzofluorene group, a phenalene group, a phenanthrene group, an anthracene group, a fluoranthene group, a triphenylene group, a pyridine group, a pyrimidine group, a quinoline group, an isoquinoline group, a benzoquinoline group, a naphthyridine group, a quinoxaline group, a quinazoline group, a carbazole group, a phenanthridine group, an acridine group, a phenanthroline group, a phenazine group, a triazine group, a dibenzofuran group, a dibenzothiophene group, and a biphenyl group; and
- a benzene group a naphthalene group, a fluorene group, a spiro-bifluorene group, a benzofluorene group, a dibenzofluorene group, a phenalene group, a phenanthrene group, an anthracene group, a fluoranthene group, a triphenylene group, a pyridine group, a pyrimidine group, a quinoline group, an isoquinoline group, a benzoquinoline group, a naphthyridine group, a quinoxaline group, a quinazoline group, a carbazole group, a phenanthridine group, an acridine group, a phenanthroline group, a phenazine group, a triazine group, a dibenzofuran group, a dibenzothiophene group, and a biphenyl group, each substituted with at least one selected
- a 12 may be a C 2 -C 60 heterocyclic group.
- a 12 may be selected from:
- a pyridine group a pyrimidine group, a quinoline group, an isoquinoline group, a benzoquinoline group, a naphthyridine group, a quinoxaline group, a quinazoline group, a carbazole group, a phenanthridine group, an acridine group, a phenanthroline group, a phenazine group, a triazine group, a dibenzofuran group, and a dibenzothiophene group; and
- a1 and a2 may each independently be an integer from 0 to 5.
- L 1 (s) When a1 is two or more, two or more of L 1 (s) may be identical to or different from each other.
- L 2 (s) When a2 is two or more, two or more of L 2 (s) may be identical to or different from each other.
- R 31 and R 32 may each independently be selected from hydrogen, deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, a substituted or unsubstituted C 1 -C 60 alkyl group, a substituted or unsubstituted C 2 -C 60 alkenyl group, a substituted or unsubstituted C 2 -C 60 alkynyl group, a substituted or unsubstituted C 1 -C 60 alkoxy group, a substituted or unsubstituted C 3 -C 10 cycloalkyl group, a substituted or unsubstituted C 1 -C 10 heterocycloalkyl group, a substituted or unsubstituted C 3 -C 10 cycloalkenyl group, a substituted or unsubstituted C 1 -C 10 heterocycloalkenyl group, a substituted or un
- R 31 and R 32 may each independently be selected from:
- a cyclopentyl group a cyclohexyl group, a cycloheptyl group, a cyclopentenyl group, a cyclohexenyl group, a phenyl group, a naphthyl group, a fluorenyl group, a spiro-bifluorenyl group, a spiro-fluorene-benzofluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenalenyl group, a phenanthrenyl group, an anthracenyl group, a fluoranthenyl group, a triphenylenyl group, a pyridinyl group, a pyrimidyl group, a quinolinyl group, an isoquinolinyl group, a benzoquinolinyl group, a naphthyridinyl group, a qui
- R 31 and R 32 may each independently be a group represented by one selected from Formulae 5-1 to 5-28:
- Y 31 may be O, S, C(Z 35 )(Z 36 ), N(Z 35 ), or Si(Z 35 )(Z 36 ),
- Z 31 to Z 36 may each independently be selected from hydrogen, deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, an amidino group, a hydrazino group, a hydrazono group, a C 1 -C 20 alkyl group, a C 1 -C 20 alkenyl group, a C 1 -C 20 alkynyl group, a C 1 -C 20 alkoxy group, a phenyl group, a biphenyl group, a terphenyl group, a naphthyl group, a fluorenyl group, a spiro-bifluorenyl group, a phenanthrenyl group, an anthracenyl group, a triperylenyl group, a pyridinyl group, a pyrimidinyl group, a carbazolyl group, and a tri
- e2 may be 1 or 2
- e3 may be an integer from 1 to 3
- e4 may be an integer from 1 to 4,
- e5 may be an integer from 1 to 5
- e6 may be an integer from 1 to 6
- e7 may be an integer from 1 to 7, and
- * indicates a binding site to a neighboring atom.
- R 31 and R 32 may each independently be selected from groups represented by Formulae 6-1 to 6-9:
- b1, b2, c1, and c2 may each independently be an integer from 0 to 5.
- R 31 When b1 is two or more, two or more R 31 (s) may be identical to or different from each other.
- R 32 When b2 is two or more, two or more R 32 (s) may be identical to or different from each other.
- two or more *-[(L 1 ) a1 -(R 31 ) b1 ](s) may be identical to or different from each other.
- two or more *-[(L 2 ) a2 -(R 32 ) b1 ](s) may be identical to or different from each other.
- At least one of R 2 , R 3 , R 5 , R 6 , R 8 , and R 9 in Formula 1 may be selected from a group represented by Formula 2-1 and a group represented by Formula 2-2,
- R 4 in Formula 1 may be a group represented by Formula 2-1, or
- R 4 and R 7 in Formula 1 may each independently be a group represented by Formula 2-1.
- a group represented by Formula 2-1 may be selected from groups represented by Formulae 2-1-(1) to 2-1-(17):
- * indicates a binding site to a neighboring atom.
- a group represented by Formula 2-2 may be selected from groups represented by Formulae 2-2-(1) and 2-2-(2):
- * indicates a binding site to a neighboring atom.
- the heterocyclic compound may be represented by Formula 11, and ⁇ Formula 11>
- R 3 and R 8 may be selected from a group represented by Formula 2-1 and a group represented by Formula 2-2, and
- X 1 , R 1 , R 2 , R 4 to R 7 , and R 9 may each independently be the same as described herein.
- X 1 and R 1 may each independently be the same as described herein, and
- R 2 , R 3 , R 5 , R 6 , R 7 , R 8 , and R 9 may each independently be hydrogen, deuterium, a cyano group, a C 1 -C 10 alkyl group, or a C 1 -C 10 alkoxy group, and R 4 may be a group represented by Formula 2-1, or
- R 2 , R 3 , R 5 , R 6 , R 8 , and R 9 may each independently be hydrogen, deuterium, a cyano group, a C 1 -C 10 alkyl group, or a C 1 -C 10 alkoxy group, and R 4 and R 7 may each independently be a group represented by Formula 2-1.
- a 1 in Formula 1 may be selected from groups represented by Formulae 1-2 to 1-7, X 2 in Formulae 1-2 to 1-7 may be N(R 21 ), and at least one of R 2 to R 11 and R 21 may be selected from a group represented by Formula 2-1 and a group represented by Formula 2-2, or
- a 1 in Formula 1 may be selected from groups represented by Formulae 1-2 to 1-7, X 2 in Formulae 1-2 to 1-7 may be selected from O, S, C(R 22 )(R 23 ), and Si(R 24 )(R 25 ), and at least one of R 2 to R 11 may be selected from a group represented by Formula 2-1 and a group represented by Formula 2-2.
- a 1 in Formula 1 may be selected from groups represented by Formulae 1-2 to 1-7, X 2 in Formulae 1-2 to 1-7 may be N(R 21 ), and at least one of R 3 , R 4 , R 7 , R 8 , and R 21 may be selected from a group represented by Formula 2-1 and a group represented by Formula 2-2, or
- a 1 in Formula 1 may be selected from groups represented by Formulae 1-2 to 1-7, X 2 in Formulae 1-2 to 1-7 may be selected from O, S, C(R 22 )(R 23 ), and Si(R 24 )(R 25 ), and at least one of R 3 , R 4 , R 7 , and R 8 may be selected from a group represented by Formula 2-1 and a group represented by Formula 2-2.
- heterocyclic compound may be represented by Formula 12 or 13:
- X 1 , X 2 , and R 1 to R 11 may each independently be defined the same as described above.
- deuterium —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, an amidino group, a hydrazino group, a hydrazono group, a C 1 -C 60 alkyl group, a C 2 -C 60 alkenyl group, a C 2 -C 60 alkynyl group, and a C 1 -C 60 alkoxy group;
- Q 1 to Q 3 , Q 11 to Q 13 , Q 21 to Q 23 , and Q 31 to Q 33 may each independently be selected from hydrogen, deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, an amidino group, a hydrazino group, a hydrazono group, a C 1 -C 60 alkyl group, a C 2 -C 60 alkenyl group, a C 2 -C 60 alkynyl group, a C 1 -C 60 alkoxy group, a C 3 -C 10 cycloalkyl group, a C 1 -C 10 heterocycloalkyl group, a C 3 -C 10 cycloalkenyl group, a C 1 -C 10 heterocycloalkenyl group, a C 6 -C 60 aryl group, a C 6 -C 60 aryl group substituted with a C 1
- X 2 may be N(R 21 ), and at least one of R 2 to R 11 and R 21 may be selected from a group represented by Formula 2-1 and a group represented by Formula 2-2, or
- X 2 may be selected from O, S, C(R 22 )(R 23 ), and Si(R 24 )(R 25 ), and at least one of R 2 to R 11 may be selected from a group represented by Formula 2-1 and a group represented by Formula 2-2.
- X 2 may be N(R 21 ), and at least one of R 3 , R 4 , R 7 , R 8 , and R 21 may be selected from a group represented by Formula 2-1 and a group represented by Formula 2-2, or
- X 2 may be selected from O, S, C(R 22 )(R 23 ), and Si(R 24 )(R 25 ), and at least one of R 3 , R 4 , R 7 , and R 8 may be selected from a group represented by Formula 2-1 and a group represented by Formula 2-2.
- the heterocyclic compound may be selected from Compounds 1 to 285, for example:
- the above heterocyclic compounds may be represented by Formula 1 wherein the positions of R 4 and R 7 are not directly N-substituted. Without being bound by theory, it is believed that, if the position of R 4 or R 7 in Formula 1 is directly N-substituted, the three-dimensional distortion between the core and the substituent may be weak, the overlap between HOMO and LUMO may be large, and ⁇ E st may also be large. According to an example embodiment, a link such as aryl, hetero, or aryl is provided between the core and the N-substituent, so as to induce the three-dimensional distortion, separate HOMO and LUMO, and control ⁇ E st to be very small. Therefore, an electronic device, for example, an organic light-emitting device, that includes the heterocyclic compound represented by Formula 1 may have a low driving voltage, high current density, and high efficiency.
- At least one of the heterocyclic compound of Formula 1 may be used between a pair of electrodes of an organic light-emitting device.
- the heterocyclic compound may be included in at least one layer selected from a hole transport region and an emission layer.
- the heterocyclic compound of Formula 1 may be used as a material for a capping layer located outside a pair of electrodes of an organic light-emitting device.
- an organic light-emitting device includes: a first electrode; a second electrode facing the first electrode; and an organic layer between the first electrode and the second electrode, the organic layer including an emission layer, wherein the organic layer includes at least one heterocyclic compound represented by Formula 1.
- (an organic layer) includes at least one heterocyclic compound” used herein may include a case in which “(an organic layer) includes identical compounds represented by Formula 1” and a case in which “(an organic layer) includes two or more different heterocyclic compounds represented by Formula 1”.
- the organic layer may include, as the heterocyclic compound, only Compound 1.
- Compound 1 may exist in an emission layer of the organic light-emitting device.
- the organic layer may include, as the heterocyclic compound, Compound 1 and Compound 2.
- Compound 1 and Compound 2 may exist in an identical layer (for example, Compound 1 and Compound 2 may all exist in an emission layer), or different layers (for example, Compound 1 may exist in an emission layer and Compound 2 may exist in an electron transport layer).
- the first electrode of the organic light-emitting device may be an anode
- the second electrode of the organic light-emitting device may be a cathode
- the organic layer of the organic light-emitting device may further include a hole transport region between the first electrode and the emission layer and an electron transport region between the emission layer and the second electrode,
- the hole transport region may include at least one layer selected from a hole injection layer, a hole transport layer, a buffer layer, an emission auxiliary layer, and an electron blocking layer, and
- the electron transport region may include an electron transport region including at least one layer selected from a hole blocking layer, an electron transport layer, and an electron injection layer.
- the electron transport region may include the heterocyclic compound represented by Formula 1.
- the electron transport region of the organic light-emitting device may include an electron transport layer and an electron injection layer, and at least one of the electron transport layer and the electron injection layer may include the heterocyclic compound represented by Formula 1.
- At least one layer selected from the electron transport layer and the electron injection layer may include an alkali metal, an alkaline earth metal, a rare earth metal, an alkali metal compound, an alkaline earth-metal compound, a rare earth metal compound, an alkali metal complex, an alkaline earth-metal complex, a rare earth metal complex, or any combinations thereof.
- the emission layer may include a dopant and a host, and the host may include at least one compound selected from an anthracene-based compound, a pyrene-based compound, and a spiro-bifluorene-based compound.
- organic layer refers to a single layer and/or a plurality of layers disposed between the first electrode and the second electrode of the organic light-emitting device.
- a material included in the “organic layer” is not limited to an organic material.
- the FIGURE illustrates a schematic view of an organic light-emitting device 10 according to an embodiment.
- the organic light-emitting device 10 includes a first electrode 110 , an organic layer 150 , and a second electrode 190 .
- a substrate may be additionally disposed under the first electrode 110 or above the second electrode 190 .
- the substrate may be a glass substrate or a plastic substrate, each having excellent mechanical strength, thermal stability, transparency, surface smoothness, ease of handling, and water resistance.
- the first electrode 110 may be formed by depositing or sputtering a material for forming the first electrode 110 on the substrate.
- the material for a first electrode may be selected from materials with a high work function to facilitate hole injection.
- the first electrode 110 may be a reflective electrode, a semi-transmissive electrode, or a transmissive electrode.
- a material for forming a first electrode may be selected from indium tin oxide (ITO), indium zinc oxide (IZO), tin oxide (SnO 2 ), zinc oxide (ZnO), and any combinations thereof, for example.
- a material for forming a first electrode may be selected from magnesium (Mg), silver (Ag), aluminum (Al), aluminum-lithium (Al—Li), calcium (Ca), magnesium-indium (Mg—In), magnesium-silver (Mg—Ag), and any combinations thereof, for example.
- the first electrode 110 may have a single-layered structure, or a multi-layered structure including two or more layers.
- the first electrode 110 may have a three-layered structure of ITO/Ag/ITO, but the structure of the first electrode 110 is not limited thereto.
- the organic layer 150 is disposed on the first electrode 110 .
- the organic layer 150 may include an emission layer.
- the organic layer 150 may further include a hole transport region between the first electrode 110 and the emission layer, and an electron transport region between the emission layer and the second electrode 190 .
- the hole transport region may have: i) a single-layered structure including a single layer including a single material, ii) a single-layered structure including a single layer including a plurality of different materials, or iii) a multi-layered structure having a plurality of layers including a plurality of different materials.
- the hole transport region may include at least one layer selected from a hole injection layer, a hole transport layer, an emission auxiliary layer, and an electron blocking layer.
- the hole transport region may have a single-layered structure including a single layer including a plurality of different materials, or a multi-layered structure having a hole injection layer/hole transport layer structure, a hole injection layer/hole transport layer/emission auxiliary layer structure, a hole injection layer/emission auxiliary layer structure, a hole transport layer/emission auxiliary layer structure, or a hole injection layer/hole transport layer/electron blocking layer structure, wherein for each structure, constituting layers are sequentially stacked from the first electrode 110 in this stated order, etc.
- the hole transport region may include at least one selected from m-MTDATA, TDATA, 2-TNATA, NPB(NPD), ⁇ -NPB, TPD, Spiro-TPD, Spiro-NPB, methylated-NPB, TAPC, HMTPD, 4,4′,4′′-tris(N-carbazolyetriphenylamine (TCTA), polyaniline/dodecylbenzenesulfonic acid (PANI/DBSA), poly(3,4-ethylenedioxythiophene)/poly(4-styrenesulfonate) (PEDOT/PSS), polyaniline/camphor sulfonic acid (PANI/CSA), polyaniline/poly(4-styrenesulfonate) (PANI/PSS), a compound represented by Formula 201, and a compound represented by Formula 202:
- L 201 to L 204 may each independently be selected from a substituted or unsubstituted C 3 -C 10 cycloalkylene group, a substituted or unsubstituted C 1 -C 10 heterocycloalkylene group, a substituted or unsubstituted C 3 -C 10 cycloalkenylene group, a substituted or unsubstituted C 1 -C 10 heterocycloalkenylene group, a substituted or unsubstituted C 6 -C 60 arylene group, a substituted or unsubstituted C 1 -C 60 heteroarylene group, a substituted or unsubstituted divalent non-aromatic condensed polycyclic group, and a substituted or unsubstituted divalent non-aromatic condensed heteropolycyclic group,
- L 205 may be selected from *—O—*′, *—S—*′, *—N(Q 201 )-*′, a substituted or unsubstituted C 1 -C 20 alkylene group, a substituted or unsubstituted C 2 -C 20 alkenylene group, a substituted or unsubstituted C 3 -C 10 cycloalkylene group, a substituted or unsubstituted C 1 -C 10 heterocycloalkylene group, a substituted or unsubstituted C 3 -C 10 cycloalkenylene group, a substituted or unsubstituted C 1 -C 10 heterocycloalkenylene group, a substituted or unsubstituted C 6 -C 60 arylene group, a substituted or unsubstituted C 1 -C 60 heteroarylene group, a substituted or unsubstituted divalent non-aromatic condensed polycyclic group, and a
- xa1 to xa4 may each independently be an integer from 0 to 3,
- xa5 may be an integer from 1 to 10,
- R 201 to R 204 and Q 201 may each independently be selected from a substituted or unsubstituted C 3 -C 10 cycloalkyl group, a substituted or unsubstituted C 1 -C 10 heterocycloalkyl group, a substituted or unsubstituted C 3 -C 10 cycloalkenyl group, a substituted or unsubstituted C 1 -C 10 heterocycloalkenyl group, a substituted or unsubstituted C 6 -C 60 aryl group, a substituted or unsubstituted C 6 -C 60 aryloxy group, a substituted or unsubstituted C 6 -C 60 arylthio group, a substituted or unsubstituted C 1 -C 60 heteroaryl group, a substituted or unsubstituted monovalent non-aromatic condensed polycyclic group, and a substituted or unsubstituted monovalent non-aro
- R 201 and R 202 may optionally be linked each other via a single bond, a dimethyl-methylene group, or a diphenyl-methylene group
- R 203 and R 204 may optionally be linked via a single bond, a dimethyl-methylene group, or a diphenyl-methylene group.
- L 201 to L 205 may each independently be selected from:
- Q 31 to Q 33 may each independently be selected from a C 1 -C 10 alkyl group, a C 1 -C 10 alkoxy group, a phenyl group, a biphenyl group, a terphenyl group, and a naphthyl group.
- xa1 to xa4 may each independently be 0, 1, or 2.
- xa5 may be 1, 2, 3, or 4.
- R 201 to R 204 and Q 201 may each independently be selected from:
- a phenyl group a biphenyl group, a terphenyl group, a pentalenyl group, an indenyl group, a naphthyl group, an azulenyl group, a heptalenyl group, an indacenyl group, an acenaphthyl group, a fluorenyl group, a spiro-bifluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenalenyl group, a phenanthrenyl group, an anthracenyl group, a fluoranthenyl group, a triphenylenyl group, a pyrenyl group, a chrysenyl group, a naphthacenyl group, a picenyl group, a perylenyl group, a pentaphenyl group, a hexacen
- a phenyl group a biphenyl group, a terphenyl group, a pentalenyl group, an indenyl group, a naphthyl group, an azulenyl group, a heptalenyl group, an indacenyl group, an acenaphthyl group, a fluorenyl group, a spiro-bifluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenalenyl group, a phenanthrenyl group, an anthracenyl group, a fluoranthenyl group, a triphenylenyl group, a pyrenyl group, a chrysenyl group, a naphthacenyl group, a picenyl group, a perylenyl group, a pentaphenyl group, a hexacen
- Q 31 to Q 33 may each independently be the same as described above.
- At least one selected from R 201 to R 203 may each independently be selected from, for example:
- a fluorenyl group a spiro-bifluorenyl group, a carbazolyl group, a dibenzofuranyl group, and a dibenzothiophenyl group;
- R 201 and R 202 may be linked each other via a single bond, and/or ii) R 203 and R 204 may be linked each other via a single bond.
- At least one selected from R 201 to R 204 may be selected from, for example:
- the compound represented by Formula 201 may be represented by Formula 201A:
- the compound represented by Formula 201 may be represented by Formula 201A(1) below, for example:
- the compound represented by Formula 201 may be represented by Formula 201A-1 below, for example:
- the compound represented by Formula 202 may be represented by Formula 202A:
- the compound represented by Formula 202 may be represented by Formula 202A-1:
- L 201 to L 203 , xa1 to xa3, xa5, and R 202 to R 204 may each independently be the same as described above,
- R 211 and R 212 may each independently be the same as described in connection with R 203 , and
- R 213 to R 217 may each independently be selected from hydrogen, deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, an amidino group, a hydrazino group, a hydrazono group, a C 1 -C 20 alkyl group, a C 1 -C 20 alkoxy group, a cyclopentyl group, a cyclohexyl group, a cycloheptyl group, a cyclopentenyl group, a cyclohexenyl group, a phenyl group, a biphenyl group, a terphenyl group, a phenyl group substituted with a C 1 -C 10 alkyl group, a phenyl group substituted with —F, a pentalenyl group, an indenyl group, a naphthyl group, an azulen
- the hole transport region may include at least one compound selected from Compounds HT1 to HT39, for example:
- a thickness of the hole transport region may be in a range of about 100 ⁇ to about 10,000 ⁇ , for example, about 100 ⁇ to about 1,000 ⁇ .
- a thickness of the hole injection layer may be in a range of about 100 ⁇ to about 9,000 ⁇ , for example, about 100 ⁇ to about 1,000 ⁇
- a thickness of the hole transport layer may be in a range of about 50 ⁇ to about 2,000 ⁇ , for example about 100 ⁇ to about 1,500 ⁇ .
- the emission auxiliary layer may increase light-emission efficiency by compensating for an optical resonance distance according to the wavelength of light emitted by an emission layer, and the electron blocking layer may block the flow of electrons from an electron transport region.
- the emission auxiliary layer and the electron blocking layer may include the materials as described above.
- the hole transport region may further include, in addition to these materials, a charge-generation material for the improvement of conductive properties.
- the charge-generation material may be homogeneously or non-homogeneously dispersed in the hole transport region.
- the charge-generation material may be, for example, a p-dopant.
- the p-dopant may have a lowest unoccupied molecular orbital (LUMO) level of ⁇ 3.5 eV or less.
- LUMO lowest unoccupied molecular orbital
- the p-dopant may include at least one selected from a quinone derivative, a metal oxide, and a cyano group-containing compound, for example.
- the p-dopant may include at least one selected from:
- a quinone derivative such as tetracyanoquinodimethane (TCNQ) or 2,3,5,6-tetrafluoro-7,7,8,8-tetracyanoquinodimethane (F4-TCNQ);
- a metal oxide such as tungsten oxide or molybdenum oxide
- R 221 to R 223 may each independently be selected from a substituted or unsubstituted C 3 -C 10 cycloalkyl group, a substituted or unsubstituted heterocycloalkyl group, a substituted or unsubstituted C 3 -C 10 cycloalkenyl group, a substituted or unsubstituted C 1 -C 10 heterocycloalkenyl group, a substituted or unsubstituted C 6 -C 60 aryl group, a substituted or unsubstituted C 1 -C 60 heteroaryl group, a substituted or unsubstituted monovalent non-aromatic condensed polycyclic group, and a substituted or unsubstituted monovalent non-aromatic condensed heteropolycyclic group, wherein at least one selected from R 221 to R 223 may have at least one substituent selected from a cyano group, —F, —Cl, —Br, —
- the emission layer may be patterned into a red emission layer, a green emission layer, or a blue emission layer, according to a sub-pixel.
- the emission layer may have a stacked structure of two or more layers selected from a red emission layer, a green emission layer, and a blue emission layer, in which the two or more layers contact each other or are separated from each other.
- the emission layer may include two or more materials selected from a red light-emitting material, a green light-emitting material, and a blue light-emitting material, in which the two or more materials are mixed with each other in a single layer to emit white light.
- the emission layer may include a host and a dopant.
- the dopant may include at least one selected from a phosphorescent dopant and a fluorescent dopant.
- an amount of the dopant may be in a range of about 0.01 parts by weight to about 15 parts by weight based on 100 parts by weight of the host, for example.
- a thickness of the emission layer may be in a range of about 100 ⁇ to about 1,000 ⁇ , for example, about 200 ⁇ to about 600 ⁇ . When the thickness of the emission layer is within this range, excellent light-emission characteristics may be obtained without a substantial increase in driving voltage.
- the host may include a compound represented by Formula 301: [Ar 301 ] xb11 -[(L 301 ) xb1 -R 301 ] xb21 ⁇ Formula 301>
- Ar 301 may be a substituted or unsubstituted C 5 -C 60 carbocyclic group or a substituted or unsubstituted C 1 -C 60 heterocyclic group,
- xb11 may be 1, 2, or 3,
- L 301 may each independently be selected from a substituted or unsubstituted C 3 -C 10 cycloalkylene group, a substituted or unsubstituted C 1 -C 10 heterocycloalkylene group, a substituted or unsubstituted C 3 -C 10 cycloalkenylene group, a substituted or unsubstituted C 1 -C 10 heterocycloalkenylene group, a substituted or unsubstituted C 6 -C 10 arylene group, a substituted or unsubstituted heteroarylene group, a substituted or unsubstituted divalent non-aromatic condensed polycyclic group, and a substituted or unsubstituted divalent non-aromatic condensed heteropolycyclic group,
- xb1 may be an integer from 0 to 5
- R 301 may be selected from deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, an amidino group, a hydrazino group, a hydrazono group, a substituted or unsubstituted C 1 -C 60 alkyl group, a substituted or unsubstituted C 2 -C 60 alkenyl group, a substituted or unsubstituted C 2 -C 60 alkynyl group, a substituted or unsubstituted C 1 -C 60 alkoxy group, a substituted or unsubstituted C 3 -C 10 cycloalkyl group, a substituted or unsubstituted C 1 -C 10 heterocycloalkyl group, a substituted or unsubstituted C 3 -C 10 cycloalkenyl group, a substituted or unsubstituted C 1
- xb21 may be an integer from 1 to 5
- Q 301 to Q 303 may each independently be selected from a C 1 -C 10 alkyl group, a C 1 -C 10 alkoxy group, a phenyl group, a biphenyl group, a terphenyl group, and a naphthyl group, for example.
- Ar 301 in Formula 301 may be selected from:
- a naphthalene group a fluorene group, a spiro-bifluorene group, a benzofluorene group, a dibenzofluorene group, a phenalene group, a phenanthrene group, an anthracene group, a fluoranthene group, a triphenylene group, a pyrene group, a chrysene group, a naphthacene group, a picene group, a perylene group, a pentaphene group, an indenoanthracene group, a dibenzofuran group, and a dibenzothiophene group; and
- a naphthalene group a fluorene group, a spiro-bifluorene group, a benzofluorene group, a dibenzofluorene group, a phenalene group, a phenanthrene group, an anthracene group, a fluoranthene group, a triphenylene group, a pyrene group, a chrysene group, a naphthacene group, a picene group, a perylene group, a pentaphene group, an indenoanthracene group, a dibenzofuran group, and a dibenzothiophene group, each substituted with at least one selected from deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, an amidino group, a hydrazino group, a hydrazono group,
- Q 31 to Q 33 may each independently be selected from a C 1 -C 10 alkyl group, a C 1 -C 10 alkoxy group, a phenyl group, a biphenyl group, a terphenyl group, and a naphthyl group, for example.
- xb11 in Formula 301 is two or more, two or more Ar301(s) may be linked via a single bond.
- the compound represented by Formula 301 may be represented by Formula 301-1 or 301-2:
- a 301 to A 304 may each independently be selected from a benzene, a naphthalene, a phenanthrene, a fluoranthene, a triphenylene, a pyrene, a chrysene, a pyridine, a pyrimidine, an indene, a fluorene, a spiro-bifluorene, a benzofluorene, a dibenzofluorene, an indole, a carbazole, benzocarbazole, dibenzocarbazole, a furan, a benzofuran, a dibenzofuran, a naphthofuran, a benzonaphthofuran, dinaphthofuran, a thiophene, a benzothiophene, a dibenzothiophene, a naphthothiophene, a benzonaphthothioph
- X 301 may be O, S, or N-[(L 304 ) xb4 -R 304 ],
- R 311 to R 314 may each independently be selected from hydrogen, deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, an amidino group, a hydrazino group, a hydrazono group, a C 1 -C 20 alkyl group, a C 1 -C 20 alkoxy group, a phenyl group, a biphenyl group, a terphenyl group, a naphthyl group —Si(Q 31 )(Q 32 )(Q 33 ), —N(Q 31 )(Q 32 ), —B(Q 31 )(Q 32 ), —C( ⁇ O)(Q 31 ), —S( ⁇ O) 2 (Q 31 ), and —P( ⁇ O)(Q 31 )(Q 32 ),
- xb22 and xb23 may each independently be 0, 1, or 2
- L 301 , xb1, R 301 , and Q 31 to Q 33 may each independently be the same as described above,
- L 302 to L 304 may each independently be the same as described in connection with L 301 ,
- xb2 to xb4 may each independently be the same as described in connection with xb1, and
- R 302 to R 304 may each independently be the same as described in connection with R 301 .
- L 301 to L 304 may each independently be selected from:
- Q 31 to Q 33 may each independently be the same as described above.
- R 301 to R 304 may each independently be selected from:
- a phenyl group a biphenyl group, a terphenyl group, a naphthyl group, a fluorenyl group, a spiro-bifluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, a fluoranthenyl group, a triphenylenyl group, a pyrenyl group, a chrysenyl group, a perylenyl group, a pentaphenyl group, a hexacenyl group, a pentacenyl group, a thiophenyl group, a furanyl group, a carbazolyl group, an indolyl group, an isoindolyl group, a benzofuranyl group, a benzothiophenyl group, a dibenzofuranyl group,
- a phenyl group a biphenyl group, a terphenyl group, a naphthyl group, a fluorenyl group, a spiro-bifluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, a fluoranthenyl group, a triphenylenyl group, a pyrenyl group, a chrysenyl group, a perylenyl group, a pentaphenyl group, a hexacenyl group, a pentacenyl group, a thiophenyl group, a furanyl group, a carbazolyl group, an indolyl group, an isoindolyl group, a benzofuranyl group, a benzothiophenyl group, a dibenzofuranyl group,
- Q 31 to Q 33 may each independently be the same as described above.
- the host may include an alkaline earth metal complex.
- the host may be selected from a Be complex (for example, Compound H55), a Mg complex, and a Zn complex.
- the host may include at least one selected from 9,10-di(2-naphthyl)anthracene (ADN), 2-methyl-9,10-bis(naphthalen-2-yl)anthracene (MADN), 9,10-di-(2-naphthyl)-2-t-butyl-anthracene (TBADN), 4,4′-bis(N-carbazolyl)-1,1′-biphenyl (CBP), 1,3-di-9-carbazolylbenzene (mCP), 1,3,5-tri(carbazol-9-yl)benzene (TCP), and Compounds H1 to H55, for example:
- the phosphorescent dopant may include an organometallic complex represented by Formula 401: M(L 401 ) xc1 (L 402 ) xc2 ⁇ Formula 401>
- M may be selected from iridium (Ir), platinum (Pt), palladium (Pd), osmium (Os), titanium (Ti), zirconium (Zr), hafnium (Hf), europium (Eu), terbium (Tb), rhodium (Rh), and thulium (Tm),
- L 401 may be selected from ligands represented by Formula 402, and xc1 may be 1, 2, or 3, wherein, when xc1 is two or more, two or more L 401 (s) may be identical to or different from each other,
- L 402 may be an organic ligand, and xc2 may be an integer from 0 to 4, wherein, when xc2 is two or more, two or more L 402 (s) may be identical to or different from each other,
- X 401 to X 404 may each independently be nitrogen or carbon;
- X 401 and X 403 may be linked via a single bond or a double bond
- X 402 and X 404 may be linked via a single bond or a double bond
- a 401 and A 402 may each independently be selected from a C 5 -C 60 carbocyclic group or a C 1 -C 60 heterocyclic group,
- X 406 may be a single bond, O, or S,
- R 401 and R 402 may each independently be selected from hydrogen, deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, an amidino group, a hydrazino group, a hydrazono group, a substituted or unsubstituted C 1 -C 20 alkyl group, a substituted or unsubstituted C 1 -C 20 alkoxy group, a substituted or unsubstituted C 3 -C 10 cycloalkyl group, a substituted or unsubstituted C 1 -C 10 heterocycloalkyl group, a substituted or unsubstituted C 3 -C 10 cycloalkenyl group, a substituted or unsubstituted C 1 -C 10 heterocycloalkenyl group, a substituted or unsubstituted C 6 -C 60 aryl group, a substituted or
- Q 401 to Q 403 may each independently be selected from a C 1 -C 10 alkyl group, a C 1 -C 10 alkoxy group, a C 6 -C 20 aryl group, and a C 1 -C 20 heteroaryl group,
- xc11 and xc12 may each independently be an integer from 0 to 10, and
- * and *′ each indicate a binding site to M in Formula 401.
- a 401 and A 402 may each independently be selected from a benzene group, a naphthalene group, a fluorene group, a spiro-bifluorene group, an indene group, a pyrrole group, a thiophene group, a furan group, an imidazole group, a pyrazole group, a thiazole group, an isothiazole group, an oxazole group, an isoxazole group, a pyridine group, a pyrazine group, a pyrimidine group, a pyridazine group, a quinoline group, an isoquinoline group, a benzoquinoline group, a quinoxaline group, a quinazoline group, a carbazole group, a benzimidazole group, a benzofuran group, a benzothiophene group, an isobenzothiophene
- X 401 may be nitrogen
- X 402 may be carbon
- X 401 and X 402 may each be nitrogen at the same time.
- R 402 and R 402 in Formula 401 may each independently be selected from:
- a cyclopentyl group a cyclohexyl group, an adamantanyl group, a norbornanyl group, a norbornenyl group, a phenyl group, a biphenyl group, a terphenyl group, a naphthyl group, a fluorenyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, a triazinyl group, a quinolinyl group, an isoquinolinyl group, a quinoxalinyl group, a quinazolinyl group, a carbazolyl group, a dibenzofuranyl group, and a dibenzothiophenyl group;
- a cyclopentyl group a cyclohexyl group, an adamantanyl group, a norbornanyl group, a norbornenyl group, a phenyl group, a biphenyl group, a terphenyl group, a naphthyl group, a fluorenyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, a triazinyl group, a quinolinyl group, an isoquinolinyl group, a quinoxalinyl group, a quinazolinyl group, a carbazolyl group, a dibenzofuranyl group, and a dibenzothiophenyl group, each substituted with at least one selected from deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano
- Q 401 to Q 403 may each independently be selected from a C 1 -C 10 alkyl group, a C 1 -C 10 alkoxy group, a phenyl group, a biphenyl group, and a naphthyl group, but are not limited thereto.
- two A 401 (s) in two or more L 401 (s) may optionally be linked via X 407 , which is a linking group, or two A 402 (s) in two or more L 401 (s) may optionally be linked via X 408 , which is a linking group (see Compounds PD1 to PD4 and PD7).
- L 402 in Formula 401 may be a monovalent, divalent, or trivalent organic ligand.
- L 402 may be selected from halogen, diketone (for example, acetylacetonate), carboxylic acid (for example, picolinate), —C( ⁇ O), isonitrile, —CN, and phosphorus (for example, phosphine, or phosphite), for example.
- the phosphorescent dopant may be selected from, for example, Compounds PD1 to PD25, for example:
- the fluorescent dopant may include an arylamine compound or a styrylamine compound.
- the fluorescent dopant may include a compound represented by Formula 501 below.
- Ar 501 may be a substituted or unsubstituted C 5 -C 60 carbocyclic group or a substituted or unsubstituted C 1 -C 60 heterocyclic group,
- L 501 to L 503 may each independently be selected from a substituted or unsubstituted C 3 -C 10 cycloalkylene group, a substituted or unsubstituted C 1 -C 10 heterocycloalkylene group, a substituted or unsubstituted C 3 -C 10 cycloalkenylene group, a substituted or unsubstituted C 1 -C 10 heterocycloalkenylene group, a substituted or unsubstituted C 6 -C 60 arylene group, a substituted or unsubstituted C 1 -C 60 heteroarylene group, a substituted or unsubstituted divalent non-aromatic condensed polycyclic group, and a substituted or unsubstituted divalent non-aromatic condensed heteropolycyclic group,
- xd1 to xd3 may each independently be an integer of 0 to 3,
- R 501 and R 502 may each independently be selected from a substituted or unsubstituted C 3 -C 10 cycloalkyl group, a substituted or unsubstituted C 1 -C 10 heterocycloalkyl group, a substituted or unsubstituted C 3 -C 10 cycloalkenyl group, a substituted or unsubstituted C 1 -C 10 heterocycloalkenyl group, a substituted or unsubstituted C 6 -C 60 aryl group, a substituted or unsubstituted C 6 -C 60 aryloxy group, a substituted or unsubstituted C 6 -C 60 arylthio group, a substituted or unsubstituted C 1 -C 60 heteroaryl group, a substituted or unsubstituted monovalent non-aromatic condensed polycyclic group, and a substituted or unsubstituted monovalent non-aromatic condensed
- xd4 may be an integer of 1 to 6.
- Ar 501 in Formula 501 may be selected from:
- L 501 to L 503 in Formula 501 may each independently be selected from:
- R 501 and R 502 in Formula 501 may each independently be selected from:
- a phenyl group a biphenyl group, a terphenyl group, a naphthyl group, a fluorenyl group, a spiro-bifluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, a fluoranthenyl group, a triphenylenyl group, a pyrenyl group, a chrysenyl group, a perylenyl group, a pentaphenyl group, a hexacenyl group, a pentacenyl group, a thiophenyl group, a furanyl group, a carbazolyl group, an indolyl group, an isoindolyl group, a benzofuranyl group, a benzothiophenyl group, a dibenzofuranyl group,
- a phenyl group a biphenyl group, a terphenyl group, a naphthyl group, a fluorenyl group, a spiro-bifluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, a fluoranthenyl group, a triphenylenyl group, a pyrenyl group, a chrysenyl group, a perylenyl group, a pentaphenyl group, a hexacenyl group, a pentacenyl group, a thiophenyl group, a furanyl group, a carbazolyl group, an indolyl group, an isoindolyl group, a benzofuranyl group, a benzothiophenyl group, a dibenzofuranyl group,
- Q 31 to Q 33 may each independently be selected from a C 1 -C 10 alkyl group, a C 1 -C 10 alkoxy group, a phenyl group, a biphenyl group, a terphenyl group, and a naphthyl group.
- xd4 in Formula 501 may be 2, for example.
- the fluorescent dopant may be selected from Compounds FD1 to FD22:
- the fluorescent dopant may be selected from the following compounds, for example.
- the electron transport region may have i) a single-layered structure including a single layer including a single material, ii) a single-layered structure including a single layer including a plurality of different materials, or iii) a multi-layered structure having a plurality of layers including a plurality of different materials.
- the electron transport region may include at least one selected from a buffer layer, a hole blocking layer, an electron control layer, an electron transport layer, and an electron injection layer, for example.
- the electron transport region may have an electron transport layer/electron injection layer structure, a hole blocking layer/electron transport layer/electron injection layer structure, an electron control layer/electron transport layer/electron injection layer structure, or a buffer layer/electron transport layer/electron injection layer structure, wherein for each structure, constituting layers are sequentially stacked from an emission layer.
- embodiments of the structure of the electron transport region are not limited thereto.
- the electron transport region (for example, a buffer layer, a hole blocking layer, an electron control layer, or an electron transport layer in the electron transport region) may include a metal-free compound containing at least one m electron-depleted nitrogen-containing ring.
- Examples of the ⁇ electron-depleted nitrogen-containing ring include an imidazole, a pyrazole, a thiazole, an isothiazole, an oxazole, an isoxazole, a pyridine, a pyrazine, a pyrimidine, a pyridazine, an indazole, a purine, a quinoline, an isoquinoline, a benzoquinoline, a phthalazine, a naphthyridine, a quinoxaline, a quinazoline, a cinnoline, a phenanthridine, an acridine, a phenanthroline, a phenazine, a benzimidazole, an isobenzothiazole, a benzoxazole, an isobenzoxazole, a triazole, a tetrazole, an oxadiazole, a triazine
- the electron transport region may include a compound represented by
- Ar 601 may be a substituted or unsubstituted C 5 -C 60 carbocyclic group or a substituted or unsubstituted C 1 -C 60 heterocyclic group,
- xe11 may be 1, 2, or 3,
- L 601 may each independently be selected from a substituted or unsubstituted C 3 -C 10 cycloalkylene group, a substituted or unsubstituted C 1 -C 10 heterocycloalkylene group, a substituted or unsubstituted C 3 -C 10 cycloalkenylene group, a substituted or unsubstituted heterocycloalkenylene group, a substituted or unsubstituted C 6 -C 60 arylene group, a substituted or unsubstituted C 1 -C 60 heteroarylene group, a substituted or unsubstituted divalent non-aromatic condensed polycyclic group, and a substituted or unsubstituted divalent non-aromatic condensed heteropolycyclic group;
- xe1 may be an integer from 0 to 5
- R 601 may be selected from a substituted or unsubstituted C 3 -C 10 cycloalkyl group, a substituted or unsubstituted C 1 -C 10 heterocycloalkyl group, a substituted or unsubstituted C 3 -C 10 cycloalkenyl group, a substituted or unsubstituted C 1 -C 10 heterocycloalkenyl group, a substituted or unsubstituted C 6 -C 60 aryl group, a substituted or unsubstituted C 6 -C 60 aryloxy group, a substituted or unsubstituted C 6 -C 60 arylthio group, a substituted or unsubstituted C 1 -C 60 heteroaryl group, a substituted or unsubstituted monovalent non-aromatic condensed polycyclic group, a substituted or unsubstituted monovalent non-aromatic condensed heteropolycyclic group,
- Q 601 to Q 603 may each independently be a C 1 -C 10 alkyl group, a C 1 -C 10 alkoxy group, a phenyl group, a biphenyl group, a terphenyl group, or a naphthyl group, and
- xe21 may be an integer from 1 to 5.
- At least one Arm in the number of xe11 and at least one R 601 in the number of xe21 may include the ⁇ electron-depleted nitrogen-containing ring.
- ring Ar 601 in Formula 601 may be selected from:
- a benzene group a naphthalene group, a fluorene group, a spiro-bifluorene group, a benzofluorene group, a dibenzofluorene group, a phenalene group, a phenanthrene group, an anthracene group, a fluoranthene group, a triphenylene group, a pyrene group, a chrysene group, a naphthacene group, a picene group, a perylene group, a pentaphene group, an indenoanthracene group, a dibenzofuran group, a dibenzothiophene group, a carbazole group, an imidazole group, a pyrazole group, a thiazole group, an isothiazole group, an oxazole group, an isoxazole group, a pyridine group, a pyrazine group
- a benzene group a naphthalene group, a fluorene group, a spiro-bifluorene group, a benzofluorene group, a dibenzofluorene group, a phenalene group, a phenanthrene group, an anthracene group, a fluoranthene group, a triphenylene group, a pyrene group, a chrysene group, a naphthacene group, a picene group, a perylene group, a pentaphene group, an indenoanthracene group, a dibenzofuran group, a dibenzothiophene group, a carbazole group, an imidazole group, a pyrazole group, a thiazole group, an isothiazole group, an oxazole group, an isoxazole group, a pyridine group, a pyrazine group
- Q 31 to Q 33 may each independently be selected from a C 1 -C 10 alkyl group, a C 1 -C 10 alkoxy group, a phenyl group, a biphenyl group, a terphenyl group, and a naphthyl group.
- xe11 in Formula 601 is two or more, two or more Ar 601 (s) may be linked via a single bond.
- Ar 601 in Formula 601 may be an anthracene group.
- a compound represented by Formula 601 may be represented by Formula 601-1:
- X 614 may be N or C(R 614 ), X 615 may be N or C(R 615 ), X 616 may be N or C(R 616 ), and at least one selected from X 614 to X 616 may be N,
- L 611 to L 613 may each independently be the same as described in connection with L 601 ,
- xe611 to xe613 may each independently be the same as described in connection with xe1,
- R 611 to R 613 may each independently be the same as described in connection with R 601 ,
- R 614 to R 616 may each independently be selected from hydrogen, deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, an amidino group, a hydrazino group, a hydrazono group, a C 1 -C 20 alkyl group, a C 1 -C 20 alkoxy group, a phenyl group, a biphenyl group, a terphenyl group, and a naphthyl group.
- L 601 and L 611 to L 613 in Formulae 601 and 601-1 may each independently be selected from, for example:
- xe1 and xe611 to xe613 in Formulae 601 and 601-1 may each independently be 0, 1, or 2.
- R 601 and R 611 to R 613 in Formula 601 and 601-1 may each independently be selected from:
- a phenyl group a biphenyl group, a terphenyl group, a naphthyl group, a fluorenyl group, a spiro-bifluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, a fluoranthenyl group, a triphenylenyl group, a pyrenyl group, a chrysenyl group, a perylenyl group, a pentaphenyl group, a hexacenyl group, a pentacenyl group, a thiophenyl group, a furanyl group, a carbazolyl group, an indolyl group, an isoindolyl group, a benzofuranyl group, a benzothiophenyl group, a dibenzofuranyl group,
- a phenyl group a biphenyl group, a terphenyl group, a naphthyl group, a fluorenyl group, a spiro-bifluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, a fluoranthenyl group, a triphenylenyl group, a pyrenyl group, a chrysenyl group, a perylenyl group, a pentaphenyl group, a hexacenyl group, a pentacenyl group, a thiophenyl group, a furanyl group, a carbazolyl group, an indolyl group, an isoindolyl group, a benzofuranyl group, a benzothiophenyl group, a dibenzofuranyl group,
- Q 601 and Q 602 may be the same as described above.
- the electron transport region may include at least one compound selected from Compounds ET1 to ET36, for example:
- the electron transport region may include at least one compound selected from 2,9-dimethyl-4,7-diphenyl-1,10-phenanthroline (BCP), 4,7-diphenyl-1,10-phenanthroline (Bphen), Alq3, BAlq, 3-(biphenyl-4-yl)-5-(4-tert-butylphenyl)-4-phenyl-4H-1,2,4-triazole (TAZ), and NTAZ.
- BCP 2,9-dimethyl-4,7-diphenyl-1,10-phenanthroline
- Bphen 4,7-diphenyl-1,10-phenanthroline
- Alq3 4,7-diphenyl-1,10-phenanthroline
- BAlq 3-(biphenyl-4-yl)-5-(4-tert-butylphenyl)-4-phenyl-4H-1,2,4-triazole (TAZ), and NTAZ.
- a thickness of the buffer layer, the hole blocking layer, or the electron control layer may be in a range of about 20 ⁇ to about 1,000 ⁇ , for example, about 30 ⁇ to about 300 ⁇ .
- the electron blocking layer may have excellent electron blocking characteristics or electron control characteristics without a substantial increase in driving voltage.
- a thickness of the electron transport layer may be in a range of about 100 ⁇ to about 1,000 ⁇ , for example, about 150 ⁇ to about 500 ⁇ . When the thickness of the electron transport layer is within the range described above, the electron transport layer may have satisfactory electron transport characteristics without a substantial increase in driving voltage.
- the electron transport region (for example, the electron transport layer in the electron transport region) may further include, in addition to the materials described above, a metal-containing material.
- the metal-containing material may include at least one selected from alkali metal complex and alkaline earth-metal complex.
- the alkali metal complex may include a metal ion selected from a Li ion, a Na ion, a K ion, a Rb ion, and a Cs ion
- the alkaline earth-metal complex may include a metal ion selected from a Be ion, a Mg ion, a Ca ion, a Sr ion, and a Ba ion.
- a ligand coordinated with the metal ion of the alkali metal complex or the alkaline earth-metal complex may be selected from a hydroxy quinoline, a hydroxy isoquinoline, a hydroxy benzoquinoline, a hydroxy acridine, a hydroxy phenanthridine, a hydroxy phenyloxazole, a hydroxy phenylthiazole, a hydroxy diphenyloxadiazole, a hydroxy diphenylthiadiazol, a hydroxy phenylpyridine, a hydroxy phenylbenzimidazole, a hydroxy phenylbenzothiazole, a bipyridine, a phenanthroline, and a cyclopentadiene, for example.
- the metal-containing material may include a Li complex.
- the Li complex may include, for example, Compound ET-D1 (lithium quinolate, LiQ) or ET-D2.
- the electron transport region may include an electron injection layer that facilitates injection of electrons from the second electrode 190 .
- the electron injection layer may directly contact the second electrode 190 .
- the electron injection layer may have i) a single-layered structure including a single layer including a single material, ii) a single-layered structure including a single layer including a plurality of different materials, or iii) a multi-layered structure having a plurality of layers including a plurality of different materials.
- the electron injection layer may include an alkali metal, an alkaline earth metal, a rare earth metal, an alkali metal compound, an alkaline earth-metal compound, a rare earth metal compound, an alkali metal complex, an alkaline earth-metal complex, a rare earth metal complex, or any combinations thereof.
- the alkali metal may be selected from Li, Na, K, Rb, and Cs. In an embodiment, the alkali metal may be Li, Na, or Cs. In an embodiment, the alkali metal may be Li or Cs, for example.
- the alkaline earth metal may be selected from Mg, Ca, Sr, and Ba.
- the rare earth metal may be selected from Sc, Y, Ce, Tb, Yb, and Gd.
- the alkali metal compound, the alkaline earth-metal compound, and the rare earth metal compound may be selected from oxides and halides (for example, fluorides, chlorides, bromides, or iodides) of the alkali metal, the alkaline earth-metal, and the rare earth metal.
- oxides and halides for example, fluorides, chlorides, bromides, or iodides
- the alkali metal compound may be selected from alkali metal oxides, such as Li 2 O, Cs 2 O, or K 2 O. and alkali metal halides, such as LiF, NaF, CsF, KF, LiI, NaI, CsI, KI, or RbI.
- the alkali metal compound may be selected from LiF, Li 2 O, NaF, LiI, NaI, CsI, and KI, for example.
- the alkaline earth-metal compound may be selected from alkaline earth-metal oxides, such as BaO, SrO, CaO, Ba x Sr 1-x O (0 ⁇ x ⁇ 1), or Ba x Ca 1-x O (0 ⁇ x ⁇ 1).
- the alkaline earth-metal compound may be selected from BaO, SrO, and CaO, for example.
- the rare earth metal compound may be selected from YbF 3 , ScF 3 , ScO 3 , Y 2 O 3 , Ce 2 O 3 , GdF 3 , and TbF 3 .
- the rare earth metal compound may be selected from YbF 3 , ScF 3 , TbF 3 , YbI 3 , ScI 3 , and TbI 3 , for example.
- the alkali metal complex, the alkaline earth-metal complex, and the rare earth metal complex may include an ion of alkali metal, alkaline earth-metal, and rare earth metal as described above, and a ligand coordinated with a metal ion of the alkali metal complex, the alkaline earth-metal complex, or the rare earth metal complex may be selected from hydroxy quinoline, hydroxy isoquinoline, hydroxy benzoquinoline, hydroxy acridine, hydroxy phenanthridine, hydroxy phenyloxazole, hydroxy phenylthiazole, hydroxy diphenyloxadiazole, hydroxy diphenylthiadiazol, hydroxy phenylpyridine, hydroxy phenylbenzimidazole, hydroxy phenylbenzothiazole, bipyridine, phenanthroline, and cyclopentadiene, for example.
- the electron injection layer may consist of an alkali metal, an alkaline earth metal, a rare earth metal, an alkali metal compound, an alkaline earth-metal compound, a rare earth metal compound, an alkali metal complex, an alkaline earth-metal complex, a rare earth metal complex, or any combinations thereof, as described above.
- the electron injection layer may further include an organic material.
- an alkali metal, an alkaline earth metal, a rare earth metal, an alkali metal compound, an alkaline earth-metal compound, a rare earth metal compound, an alkali metal complex, an alkaline earth-metal complex, a rare earth metal complex, or any combinations thereof may be homogeneously or non-homogeneously dispersed in a matrix including the organic material.
- a thickness of the electron injection layer may be in a range of about 1 ⁇ to about 100 ⁇ , for example, about 3 ⁇ to about 90 ⁇ . When the thickness of the electron injection layer is within the range described above, the electron injection layer may have satisfactory electron injection characteristics without a substantial increase in driving voltage.
- the second electrode 190 may be disposed on the organic layer 150 having such a structure.
- the second electrode 190 may be a cathode which is an electron injection electrode, and in this regard, a material for forming the second electrode 190 may be selected from metal, an alloy, an electrically conductive compound, and a combination thereof, which have a relatively low work function.
- the second electrode 190 may include at least one selected from lithium (Li), silver (Ag), magnesium (Mg), aluminum (Al), aluminum-lithium (Al—Li), calcium (Ca), magnesium-indium (Mg—In), magnesium-silver (Mg—Ag), ITO, and IZO, for example.
- the second electrode 190 may be a transmissive electrode, a semi-transmissive electrode, or a reflective electrode.
- the second electrode 190 may have a single-layered structure, or a multi-layered structure including two or more layers.
- the organic light-emitting device is described in connection with the FIGURE, for example.
- Layers constituting the hole transport region, an emission layer, and layers constituting the electron transport region may be formed in a certain region by using one or more suitable methods selected from vacuum deposition, spin coating, casting, Langmuir-Blodgett (LB) deposition, ink-jet printing, laser-printing, and laser-induced thermal imaging.
- suitable methods selected from vacuum deposition, spin coating, casting, Langmuir-Blodgett (LB) deposition, ink-jet printing, laser-printing, and laser-induced thermal imaging.
- the deposition may be performed at a deposition temperature of about 100° C. to about 500° C., a vacuum degree of about 10 ⁇ 8 torr to about 10-3 torr, and a deposition speed of about 0.01 ⁇ /sec to about 100 ⁇ /sec by taking into account a material to be included in a layer to be formed, and the structure of a layer to be formed.
- the spin coating may be performed at a coating speed of about 2000 rpm to about 5000 rpm and at a heat treatment temperature of about 80° C. to 200° C. by taking into account a material to be included in a layer to be formed, and the structure of a layer to be formed.
- C 1 -C 60 alkyl group refers to a linear or branched aliphatic saturated hydrocarbon monovalent group having 1 to 60 carbon atoms, and examples thereof include a methyl group, an ethyl group, a propyl group, an isobutyl group, a sec-butyl group, a tert-butyl group, a pentyl group, an isoamyl group, and a hexyl group.
- C 1 -C 60 alkylene group refers to a divalent group having the same structure as the C 1 -C 60 alkyl group.
- C 2 -C 60 alkenyl group refers to a hydrocarbon group having at least one carbon-carbon double bond in the middle or at the terminus of the C 2 -C 60 alkyl group, and examples thereof include an ethenyl group, a propenyl group, and a butenyl group.
- C 2 -C 60 alkenylene group refers to a divalent group having the same structure as the C 2 -C 60 alkenyl group.
- C 2 -C 60 alkynyl group refers to a hydrocarbon group having at least one carbon-carbon triple bond in the middle or at the terminus of the C 2 -C 60 alkyl group, and examples thereof include an ethynyl group, and a propynyl group.
- C 2 -C 60 alkynylene group refers to a divalent group having the same structure as the C 2 -C 60 alkynyl group.
- C 1 -C 60 alkoxy group refers to a monovalent group represented by —OA 101 (wherein A 101 is the C 1 -C 60 alkyl group), and examples thereof include a methoxy group, an ethoxy group, and an isopropyloxy group.
- C 3 -C 10 cycloalkyl group refers to a monovalent saturated hydrocarbon monocyclic group having 3 to 10 carbon atoms, and examples thereof include a cyclopropyl group, a cyclobutyl group, a cyclopentyl group, a cyclohexyl group, and a cycloheptyl group.
- C 3 -C 10 cycloalkylene group refers to a divalent group having the same structure as the C 3 -C 10 cycloalkyl group.
- C 1 -C 10 heterocycloalkyl group refers to a monovalent monocyclic group having at least one heteroatom selected from N, O, Si, P, and S as a ring-forming atom and 1 to 10 carbon atoms, and examples thereof include a 1,2,3,4-oxatriazolidinyl group, a tetrahydrofuranyl group, and a tetrahydrothiophenyl group.
- C 1 -C 10 heterocycloalkylene group refers to a divalent group having the same structure as the C 1 -C 10 heterocycloalkyl group.
- C 3 -C 10 cycloalkenyl group used herein refers to a monovalent monocyclic group that has 3 to 10 carbon atoms and at least one carbon-carbon double bond in the ring thereof and no aromaticity, and examples thereof include a cyclopentenyl group, a cyclohexenyl group, and a cycloheptenyl group.
- C 3 -C 10 cycloalkenylene group refers to a divalent group having the same structure as the C 3 -C 10 cycloalkenyl group.
- C 1 -C 10 heterocycloalkenyl group refers to a monovalent monocyclic group that has at least one heteroatom selected from N, O, Si, P, and S as a ring-forming atom, 1 to 10 carbon atoms, and at least one carbon-carbon double bond in its ring.
- Non-limiting examples of the C 1 -C 10 heterocycloalkenyl group include a 4,5-dihydro-1,2,3,4-oxatriazolyl group, a 2,3-dihydrofuranyl group, and a 2,3-dihydrothiophenyl group.
- C 1 -C 10 heterocycloalkenylene group refers to a divalent group having the same structure as the C 1 -C 10 heterocycloalkenyl group.
- C 6 -C 60 aryl group refers to a monovalent group having a carbocyclic aromatic system having 6 to 60 carbon atoms
- a C 6 -C 60 arylene group used herein refers to a divalent group having a carbocyclic aromatic system having 6 to 60 carbon atoms.
- Non-limiting examples of the C 6 -C 60 aryl group include a phenyl group, a naphthyl group, an anthracenyl group, a phenanthrenyl group, a pyrenyl group, and a chrysenyl group.
- the C 6 -C 60 aryl group and the C 6 -C 60 arylene group each include two or more rings, the rings may be fused to each other.
- C 1 -C 60 heteroaryl group refers to a monovalent group having a carbocyclic aromatic system that has at least one heteroatom selected from N, O, Si, P, and S as a ring-forming atom, in addition to 1 to 60 carbon atoms.
- C 1 -C 60 heteroarylene group refers to a divalent group having a carbocyclic aromatic system that has at least one heteroatom selected from N, O, Si, P, and S as a ring-forming atom, in addition to 1 to 60 carbon atoms.
- Non-limiting examples of the C 1 -C 10 heteroaryl group include a pyridinyl group, a pyrimidinyl group, a pyrazinyl group, a pyridazinyl group, a triazinyl group, a quinolinyl group, and an isoquinolinyl group.
- the C 1 -C 60 heteroaryl group and the C 1 -C 60 heteroarylene group each include two or more rings, the rings may be condensed with each other.
- C 6 -C 60 aryloxy group refers to —OA 102 (wherein A 102 is the C 6 -C 60 aryl group), and a C 6 -C 60 arylthio group used herein indicates —SA 103 (wherein A 103 is the C 6 -C 60 aryl group).
- the term “monovalent non-aromatic condensed polycyclic group” as used herein refers to a monovalent group (for example, having 8 to 60 carbon atoms) having two or more rings condensed with each other, only carbon atoms as ring-forming atoms, and no aromaticity in its entire molecular structure.
- a detailed example of the monovalent non-aromatic condensed polycyclic group is a fluorenyl group.
- divalent non-aromatic condensed polycyclic group refers to a divalent group having the same structure as the monovalent non-aromatic condensed polycyclic group.
- the term “monovalent non-aromatic condensed heteropolycyclic group” as used herein refers to a monovalent group (for example, having 1 to 60 carbon atoms) having two or more rings condensed to each other, at least one heteroatom selected from N, O, Si, P, and S, other than carbon atoms, as a ring-forming atom, and no aromaticity in its entire molecular structure.
- An example of the monovalent non-aromatic condensed heteropolycyclic group is a carbazolyl group.
- divalent non-aromatic condensed heteropolycyclic group refers to a divalent group having the same structure as the monovalent non-aromatic condensed heteropolycyclic group.
- C 5 -C 60 carbocyclic group refers to a monocyclic or polycyclic group having 5 to 60 carbon atoms in which a ring-forming atom is a carbon atom only.
- the C 5 to C 60 carbocyclic group may be an aromatic carbocyclic group or a non-aromatic carbocyclic group.
- the C 5 to C 60 carbocyclic group may be a ring, such as benzene, a monovalent group, such as a phenyl group, or a divalent group, such as a phenylene group.
- the C 5 to C 60 carbocyclic group may be a trivalent group or a quadrivalent group.
- C 1 -C 60 heterocyclic group refers to a group having the same structure as the C 1 -C 60 carbocyclic group, except that as a ring-forming atom, at least one heteroatom selected from N, O, Si, P, and S is used in addition to carbon (the number of carbon atoms may be in a range of 1 to 60).
- deuterium —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, an amidino group, a hydrazino group, a hydrazono group, a C 1 -C 60 alkyl group, a C 2 -C 60 alkenyl group, a C 2 -C 60 alkynyl group, and a C 1 -C 60 alkoxy group;
- Q 11 to Q 13 , Q 21 to Q 23 , and Q 31 to Q 33 may each independently be selected from hydrogen, deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, an amidino group, a hydrazino group, a hydrazono group, a C 1 -C 60 alkyl group, a C 2 -C 60 alkenyl group, a C 2 -C 60 alkynyl group, a C 1 -C 60 alkoxy group, a C 3 -C 10 cycloalkyl group, a C 1 -C 10 heterocycloalkyl group, a C 3 -C 10 cycloalkenyl group, a C 1 -C 10 heterocycloalkenyl group, a C 6 -C 60 aryl group, a C 60 heteroaryl group, a monovalent non-aromatic condensed polycyclic group,
- Ph represents a phenyl group
- Me represents a methyl group
- Et represents an ethyl group
- ter-Bu represents a tert-butyl group
- OMe represents a methoxy group
- biphenyl group refers to a “phenyl group substituted with a phenyl group.
- the “biphenyl group” is a “substituted phenyl group” having a “C 6 -C 60 aryl group” as a substituent.
- terphenyl group refers to a “phenyl group substituted with a biphenyl group.
- the “terphenyl group” is a “phenyl group” having, as a substituent, a “C 6 -C 60 aryl group substituted with a C 6 -C 60 aryl group.”
- a Corning 15 ⁇ /cm 2 (1,200 ⁇ ) ITO glass substrate was sonicated with isopropyl alcohol and pure water each for 5 minutes and cleaned by exposure to ultraviolet rays and ozone for 30. Then, the ITO glass substrate was provided to a vacuum deposition apparatus.
- Compound NPD was vacuum-deposited on the ITO glass substrate to form a hole injection layer having a thickness of 600 ⁇ , and mCP was vacuum-deposited on the hole injection layer to form a hole transport layer having a thickness of 300 ⁇ .
- Compound 1 and FIrpic bis[2-(4,6-difluorophenyl)pyridinato-C 2 ,N](picolinato)iridium(III)) were co-deposited on the hole transport layer at a weight ratio of 98:2 to form an emission layer having a thickness of 300 ⁇ .
- DPEPO was deposited on the emission layer to form an electron transport layer having a thickness of 300 ⁇
- LiF was deposited on the electron transport layer to form an electron injection layer having a thickness of 10 ⁇
- Al was vacuum-deposited on the electron injection layer to a thickness of 3,000 ⁇ to form an LiF/Al electrode, thereby completing the manufacture of an organic light-emitting device.
- Organic light-emitting devices were manufactured in the same manner as in Example 1, except that Compounds shown in Table 2 were each used instead of Compound 1 in forming an emission layer.
- the driving voltage, current density, luminance, efficiency, and color coordinates of the organic light-emitting devices manufactured according to Examples 1 to 10 and Comparative Examples 1 and 2 were measured by using Keithley SMU 236 and a luminance meter PR650, and results thereof are shown in Table 2.
- the organic light-emitting devices of Examples 1 to 5, in which Compound of Formula 1 was used as a host of an emission layer, may provide low driving voltage, high luminance, high efficiency, and excellent lifespan characteristics, as compared with those of the organic light-emitting device of Comparative Example 1.
- the organic light-emitting devices of Examples 6 to 10 in which Compound of Formula 1 was used as a dopant of an emission layer, may provide low driving voltage, high luminance, high efficiency, and excellent lifespan characteristics, as compared with those of the organic light-emitting devices of Comparative Examples 2 to 4.
- an organic light-emitting device including the heterocyclic compound according to an embodiment may have a low driving voltage, high efficiency, high luminance, and a long lifespan.
Abstract
Description
[Ar301]xb11-[(L301)xb1-R301]xb21 <Formula 301>
M(L401)xc1(L402)xc2 <Formula 401>
[Ar601]xe11-[(L601)xe1-R601]xe21 <Formula 601>
TABLE 1 | ||
HR-EIMS |
Compound | 1H NMR (CDCl3, 500 MHz) | found | calc. |
1 | δ = 8.37 (d, 4H), 8.20 (d, 1H), 8.10 (s, 1H), | 524.32 | 523.14 |
7.78-7.72 (m, 3H), 7.61 (t, 1H), | |||
7.52-7.48 (m, 9H), 7.39 (d, 1H), | |||
7.21 (d, 1H) | |||
5 | δ = 8.40 (d, 4H), 8.10 (s, 1H), 7.98-7.89 | 704.52 | 703.24 |
(m, 5H), 7.88 (d, 1H), 7.79-7.72 (m, 3H), | |||
7.61 (t, 1H), 7.52-7.48 (m, 9H), 7.40 (d, 1H), | |||
7.22-7.19 (m, 2H), 7.14 (d, 1H), 2.69 (s, 6H) | |||
6 | δ = 9.13 (s, 1H), 8.39 (d, 4H), 8.25 (d, 1H), | 601.27 | 600.17 |
8.18 (d, 1H), 8.12 (s, 1H), 7.95 (d, 1H), | |||
7.80-7.75 (m, 3H), 7.62 (t, 1H), 7.55-7.51 | |||
(m, 9H), 7.42 (d, 1H), 7.33-7.28 (m, 2H) | |||
12 | δ = 8.98 (d, 1H), 8.59 (d, 1H), 8.25-8.19 | 595.16 | 594.17 |
(m, 5H), 8.10-8.06 (m, 2H), 7.91 (d, 1H), | |||
7.81-7.75 (m, 4H), 7.65 (t, 1H), 7.57-7.51 | |||
(m, 4H), 7.45 (d, 1H), 7.37-7.25 (m, 7H) | |||
17 | δ = 8.20 (s, 1H), 7.95 (d, 1H), 7.87-7.81 | 576.30 | 575.20 |
(m, 3H), 7.75 (t, 1H), 7.65-7.61 (m, 5H), | |||
7.51-7.46 (m, 3H), 7.32-7.24 (m, 8H), | |||
6.80 (t, 2H), 1.69 (s, 6H) | |||
20 | δ = 7.80-7.73 (m, 3H), 7.65 (t, 1H), | 707.46 | 706.27 |
7.58-7.53 (m, 4H), 7.40-7.22 (m, 2H), | |||
7.14-7.09 (m, 12H), 7.02 (s, 1H), 6.91 | |||
(t, 4H), 1.69 (s, 12H) | |||
25 | δ = 9.88 (s, 1H), 8.59 (d, 1H), 8.45-8.29 | 595.63 | 594.17 |
(m, 4H), 8.21 (s, 1H), 8.01-7.97 (m, 2H), | |||
7.87-7.80 (m, 6H), 7.73-7.62 (m, 5H), | |||
7.57-7.51 (m, 4H), 7.46 (d, 1H), 7.32-7.28 | |||
(m, 2H) | |||
37 | δ = 8.48 (d, 4H), 8.27 (d, 1H), 8.15 (s, 1H), | 613.25 | 612.17 |
7.84-7.80 (m, 3H), 7.61 (t, 1H), 7.56-7.49 | |||
(d, 11H), 7.27-7.20 (m, 4H) | |||
43 | δ = 8.46-8.43 (m, 5H), 8.37 (s, 1H), | 640.61 | 639.21 |
7.87-7.83 (m, 4H), 7.69-7.61 (m, 2H), | |||
7.54-7.50 (m, 9H), 7.42 (s, 1H), 7.26-7.22 | |||
(m, 2H), 1.79 (s, 6H) | |||
50 | δ = 8.40 (d, 4H), 8.27 (d, 1H), 7.98 (s, 1H), | 614.36 | 613.16 |
7.85 (d, 1H), 7.81-7.75 (m, 5H), 7.64 (t, 1H), | |||
7.58-7.52 (m, 9H), 7.28-7.24 (m, 2H) | |||
TABLE 2 | ||||||
Emission | Driving | Current | Half lifespan | |||
layer | voltage | density | Luminance | Efficiency | (hr @100 | |
(host) | (V) | (mA/cm2) | (cd/m2) | (cd/A) | mA/cm2) | |
Example 1 | Compound 1 | 4.92 | 50 | 3197 | 6.39 | 299 |
Example 2 | Compound 5 | 5.06 | 50 | 3597 | 7.19 | 316 |
Example 3 | Compound 17 | 5.14 | 50 | 3374 | 6.75 | 342 |
Example 4 | Compound 25 | 5.51 | 50 | 2955 | 5.91 | 301 |
Example 5 | Compound 43 | 5.47 | 50 | 3074 | 6.15 | 276 |
Comparative | BCPO | 6.49 | 50 | 2593 | 5.19 | 255 |
Example 6 | Compound 6 | 6.33 | 50 | 2941 | 5.89 | 306 |
Example 7 | Compound 12 | 5.79 | 50 | 2977 | 5.95 | 300 |
Example 8 | Compound 20 | 5.69 | 50 | 3179 | 6.36 | 337 |
Example 9 | Compound 37 | 6.11 | 50 | 3056 | 6.11 | 291 |
Example 10 | Compound 50 | 5.79 | 50 | 3058 | 6.12 | 315 |
Comparative | FIrpic | 6.99 | 50 | 2745 | 5.49 | 266 |
Example 2 | ||||||
Comparative | Compound A | 6.89 | 50 | 2642 | 5.48 | 228 |
Example 3 | ||||||
Comparative | Compound B | 6.76 | 50 | 2612 | 5.39 | 239 |
Example 4 | ||||||
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